Yamaha - Propeller Shaft Drivetrain Component 6K1-45611-29-00. Overview. The Yamaha Propeller Shaft 6K1-45611-29-00 is one of the core pieces that actually puts power into the water. If this shaft isn't straight and solid, you'll feel it right away-vibration, noise, or a loss of performance. It takes everything the engine delivers and transfers it directly to the prop, so it has to handle serious load every time you throttle up. When you're rebuilding a lower unit or fixing damage, this is not a part you cut corners on.. Key Features. • Direct Power Transfer - Carries engine torque straight to the propeller for reliable propulsion.. • Precision Machined Shaft - Ensures proper alignment and smooth rotation under load.. • High-Strength Construction - Built to handle torque, impact, and continuous operation.. • Balanced Performance - Helps reduce vibration and maintain smooth drivetrain operation.. Compatibility. Compatible with select Yamaha outboard engines using this propeller shaft co